Display pdf generated using mpdf inline in mobile browsers
I stumbled upon this StackOverflow post. You can also try Google embeddable PDF Viewer
As per the blog:
Google Docs offers an undocumented feature that lets you embed PDF files and PowerPoint presentations in a web page. The files don't have to be uploaded to Google Docs, but they need to be available online.
based on documentation :
I: send the file inline to the browser. The plug-in is used if available. The name given by $filename is used when one selects the “Save as” option on the link generating the PDF.
You need plug-in installed on your browser to embed the PDF document (Desktop and Mobile). If your browser doesn't has PDF Viewer plug-in, PDF document will be downloaded automatically.
You can use Javascript plugin such as pdfJs to embed your PDF document in cross browsers.